After you click on the "Customize Appearance" link, the bar on the left should show either your selected theme or "custom theme." You should see an "Edit HTML" button next to it. Clicking on that will bring you to the HTML of your theme. You can change your background on the HTML. Or instead of going to the custom HTML, you can go under Appearance and you can either upload a picture for your background or change the colour of it.
Your Tumblr background can be changed by going to your dashboard and selecting 'customize' from there you select 'appearance' and scroll down the drop down bar until you come to 'background' you can then select an image or a plain background colour.
if you have a theme installed, you cannot change your background in any way. but if you do not have a theme installed, you go to dashboard>preferences>customize>appearance> then there should be a button that says Upload Background Image
Go to your tumblr customize html. Press Ctrl F and type 'background' (without quotation marks) if you find something under the .body like this: background: #FFFFFF; (or another color code) change it to: background-image: url(YOURIMGHERE); If that code is already there, then just put the URL of the image in the brackets
Go to Tumblr Dashboard >> Your Blog >> Customize Add about me in the description box and save.
tumblr.com/customize-classic
It's easy to customize your blog's theme on the Tumblr app for Android. Just go to your blog page and click Edit at the top. From there you can change your theme and customize its colors and fonts
When on the customize page, erase everything in the address bar up to the word customize. Then add -classic to the end of it. That should change it back to the old layout!
Because there's a customize button on customize, and you can select in the advanced tab, I think, whether you want Google to show it or not.
Depending upon which theme you have....Type in the name of your blog .tumblr.com/customize-classic Then click "appearance" then there should be a sentence that says "sidebar picture" click upload, and upload the photo you want.
Customize>Theme>Custom HTML>Paste your layout code
Customize>Info>URL Delete that and write the URL you want.
Go to your page On the top right hand side there should be a button that says "customize" Click on it You can edit whatever you like from there!